CN102616793B - Method for eliminating metal ions in rice hulls by utilizing industrial flue gas - Google Patents
Method for eliminating metal ions in rice hulls by utilizing industrial flue gas Download PDFInfo
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- CN102616793B CN102616793B CN201210082138.1A CN201210082138A CN102616793B CN 102616793 B CN102616793 B CN 102616793B CN 201210082138 A CN201210082138 A CN 201210082138A CN 102616793 B CN102616793 B CN 102616793B
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- rice husk
- water
- gas
- industrial smoke
- carbonic acid
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- 235000007164 Oryza sativa Nutrition 0.000 title claims abstract description 100
- 235000009566 rice Nutrition 0.000 title claims abstract description 100
- 229910021645 metal ion Inorganic materials 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 36
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title abstract description 9
- 239000003546 flue gas Substances 0.000 title abstract description 9
- 240000007594 Oryza sativa Species 0.000 title 1
- 241000209094 Oryza Species 0.000 claims abstract description 99
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000010903 husk Substances 0.000 claims description 90
- 239000000779 smoke Substances 0.000 claims description 45
- 235000011089 carbon dioxide Nutrition 0.000 claims description 25
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 22
- 238000005273 aeration Methods 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 239000012266 salt solution Substances 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 34
- 239000001569 carbon dioxide Substances 0.000 abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 10
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract 1
- 239000013049 sediment Substances 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 10
- 238000001556 precipitation Methods 0.000 description 8
- 239000002028 Biomass Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000005543 nano-size silicon particle Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000012498 ultrapure water Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000050 nutritive effect Effects 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229960001866 silicon dioxide Drugs 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920002488 Hemicellulose Polymers 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010795 gaseous waste Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
- A23L5/23—Removal of unwanted matter, e.g. deodorisation or detoxification by extraction with solvents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/60—Preparation of carbonates or bicarbonates in general
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/20—Removal of unwanted matter, e.g. deodorisation or detoxification
- A23L5/27—Removal of unwanted matter, e.g. deodorisation or detoxification by chemical treatment, by adsorption or by absorption
- A23L5/276—Treatment with inorganic compounds
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L7/00—Cereal-derived products; Malt products; Preparation or treatment thereof
- A23L7/10—Cereal-derived products
- A23L7/115—Cereal fibre products, e.g. bran, husk
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nutrition Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for eliminating metal ions in rice hulls by utilizing industrial flue gas. The method comprises the following steps of: arranging a gas dispersing device for discharging industrial flue gas at the bottom of a water storage reaction tank, bagging and throwing the rice hulls into the water storage reaction tank, pressing the bagged rice hulls below the water surface, then, spraying the industrial flue gas in the tank through the gas dispersing device, increasing the solubility of carbon dioxide in the industrial flue gas in water by utilizing water pressure in the water storage reaction tank, reacting a generated carbonic acid solution and the metal ions in the rice hulls to generate sediment, after reacting, cleaning and extruding the rice hulls by using salt-free water, and eliminating the metal ions adsorbed on the rice hulls. According to the invention, the purpose of eliminating the metal ions in the rice hulls is achieved by introducing the industrial flue gas in water, dissolving carbon dioxide contained in the industrial flue gas in water to form carbonic acid, and reacting the carbonic acid with the rice hulls immersed in water; and the method provided by the invention has the characteristics of low pollution, low energy consumption and high-benefit circular economy.
Description
Technical field
The present invention relates to the recovery and utilization technology field of rice husk, refer to particularly a kind of method of utilizing industrial smoke to remove metal ion in rice husk.
Background technology
China is that paddy is produced the first big country in the world, and within 2008, Monitoring of Paddy Rice Plant Area approximately reaches 4.3 hundred million mu, and approximately 1.89 hundred million tons of ultimate productions, can produce the rice husk of nearly 4,000 ten thousand tons, and the annual rice husk total amount in the whole world reaches more than 6,800 ten thousand tons.Rice husk, by water, organic matter (xylogen, Mierocrystalline cellulose, hemicellulose), amorphous silica, also has a small amount of metal ion to form.The former chaff of often only wearing into of rice husk adds in feed, along with development in science and technology, rice husk utilization constantly has new breakthrough, many new Industry Models have been born thereupon, rice husk power generating, rice husk gasification liquefaction, rice husk are prepared nanometer product etc., and wherein a very important application industry is for utilizing rice husk preparing nano silicon-dioxide.
Existingly utilize the method that rice husk is prepared silicon-dioxide to be, first strong acid for rice husk (example hydrochloric acid, sulfuric acid, nitric acid etc.) is boiled, with ultrapure water, wash again, then by its calcination, remove most of impurity, then embathe with high purity water and wash through strong acid, further reduce foreign matter content, after to be dried, through biomass electric power plant, after combustion power generation or chemical heat are decomposed under certain condition, generation product is nano silicon.
The effect that adopts strong acid to boil in aforesaid method and embathe rice husk is to remove the metal ion in rice husk.This is because the metal ion in rice husk is to exist in rice husk with suction type, under acidic conditions, can from rice husk, separate.But strong acid is acid large, easily human body is damaged and produced contaminate environment, and utilizing it to process the waste water obtaining after rice husk cannot directly discharge, need a large amount of subsequent disposal operations to remove strong acid, just can reach emission request, so the method shortcoming economy.
Summary of the invention
The object of the invention is to overcome the defect of prior art shortcoming economy, provide the industrial smoke that utilizes of a kind of efficient, environmental protection, good economy performance to remove the method for metal ion in rice husk.
For achieving the above object, the industrial smoke that utilizes that the present invention is designed is removed the method for metal ion in rice husk, to be provided with for discharging the gas dispersion apparatus of industrial smoke in retaining reaction tank bottom, rice husk is packed and is thrown in described retaining reaction tank, packed rice husk is pressed into underwater, then by gas dispersion apparatus, industrial smoke is sprayed in pond, utilize the hydraulic pressure in retaining reaction tank, carbonic acid gas solubleness in water in industrial smoke is increased, solubleness is 100 grams of water-soluble 1 gram of carbonic acid gas, the carbonic acid soln generating and the metal ion in the rice husk generation throw out that reacts, after completion of the reaction, clean rice husk and use without salt solution and clean extruding, slough the metal ion adsorbing on rice husk.
Preferably, the degree of depth of described retaining reaction tank is 6～10m.Retaining reaction tank need have the suitable degree of depth, and the carbonic acid gas meeting from the industrial smoke of ejection at the bottom of pond dissolves the suitable carbonic acid of formation concentration in water.
Preferably, on described gas dispersion apparatus, offer and make water body laterally or the gas orifice of longitudinal shrinking turbulence stirring, and industrial smoke sprays from described gas orifice.During water body turn, can further increase the degree of scatter of carbon dioxide in water, to increase the formation of carbonic acid, the implementation of utilizing gas injection that water body vortex is stirred can be a plurality of gas orifice annular arrangements, tangential jet etc. laterally, be common technology means, do not repeat herein.
Preferably, described gas orifice higher than pond at the bottom of more than 1.5m.Due to carbonic acid and rice husk, meeting in reaction process produces precipitation, for fear of precipitation, stops up gas orifice, and gas orifice is arranged on apart from position more than 1.5m at the bottom of pond.
Preferably, the pore size of described gas orifice is 0.005～0.012mm.When gas sprays from gas orifice, meet Laplace formula, both spherical liquid level additional pressure was directly proportional to coefficient of surface tension, was inversely proportional to spherical radius; When coefficient of surface tension one timing, radius is less, and additional pressure is larger.Shower nozzle aperture is less, and the bubble of ejection is less, and when little carbonic acid gas bubble is from air nozzle ejection, bubble increases, and surface tension reduces rapidly, and bubble breaks, thereby increase carbonic acid gas and water engaging surface are long-pending, improve carbonic acid in water and form speed.
Preferably, on described gas dispersion apparatus, be provided with a plurality of micro porous aeration heads, and industrial smoke sprays from described micro porous aeration head.Micro porous aeration head is a kind of mode that increases carbonic acid gas solubleness in water equally, can directly by commercially available, be buied.
The designed another kind of the present invention utilizes industrial smoke to remove the method for metal ion in rice husk, to be provided with the gas distributor with micro porous aeration head in retort bottom, the tank skin of the retort of gas distributor below is provided with circulation fluid outlet, at retort top, be provided with pneumatic outlet, bottom and be provided with throw out outlet, on the top of retort, be provided with liquid distributor; While using described retort, first in retort, load rice husk and water, and to keep pneumatic outlet be closing condition, in the micro porous aeration head of industrial smoke from gas distributor, spray, utilize the pressure of the industrial smoke in retort itself, carbonic acid gas in the industrial smoke solubleness in water is increased, solubleness is 100 grams of water-soluble 4 grams of carbonic acid gas, the carbonic acid soln generating and the metal ion in the rice husk generation throw out that reacts, after completion of the reaction, clean rice husk and use without salt solution and clean extruding, sloughing the metal ion adsorbing on rice husk.
The above-mentioned square ratio juris of utilizing industrial smoke to remove metal ion in rice husk is: utilize the carbon dioxide solubility in industrial smoke in water, to generate carbonic acid, acidifying rice husk, react and generate difficulty soluble salt with the metal ion such as aluminium wherein, calcium, magnesium, iron, manganese, reaction precipitation thing is mainly metal carbonate or oxide compound, thereby can remove efficiently the metal ion in rice husk.Carbonic acid gas (CO
2) be non-polar molecule, but can be dissolved in the solvent that polarity is stronger, its solubleness size is relevant with the character of temperature, pressure and solvent, the rising of the solubility with temperature of carbonic acid gas and reducing, the volume of the carbonic acid gas dissolving in saturated aqueous solution under normal temperature and pressure and the volume ratio of water are about 1: 1, most of carbonic acid gas is to exist with the hydrate molecular form in conjunction with weak, only have sub-fraction to form carbonic acid, and the carbonic acid of this concentration cannot be processed large batch of rice husk.When carbon dioxide gas pressure is during lower than 0.5MPa, its solubleness is directly proportional to pressure, while surpassing 0.5MPa, formation due to carbonic acid, when pressure raises, the amplitude that Solubilities of Carbon Dioxide increases will increase, so will increase the concentration of carbonic acid in water, to meet the requirement of removing metal ion in rice husk, the gaseous tension that improves carbonic acid gas is crucial.
In order to increase the equilibrium pressure of carbonic acid gas on liquid level, can adopt three kinds of modes: a kind of is to utilize hydraulic pressure, the second is to choose some gas dispersion apparatus, and the third is to select closed container to increase the air pressure on liquid level in container.The method that retaining reaction tank is set provided by the present invention is to utilize hydraulic pressure and gas dispersion apparatus to improve the solubleness of carbonic acid gas in water, and the method that retort is set is to utilize closed container to make the carbonic acid gas on the liquid level in container reach high pressure, impel carbon dioxide to dissolve.
Retaining reaction tank is set and removes the method for metal ion in rice husk and have and process that rice husk total amount is large, equipment simple, the feature of processing ease, the impurity such as dust that can slough metal ion in rice husk and adhere to, for the first bulk processing of rice husk.
Retort is set and removes in rice husk the method for metal ion and have that condition is controlled, Solubilities of Carbon Dioxide large, process the high feature of rice husk efficiency, for rice husk secondary fine, process.
Compare with the existing method of utilizing strong acid to remove metal ion, advantage of the present invention is:
One, a little less than carbonic acid acidity, environmental pollution is little, and adopts the industrial smoke that contains great amount of carbon dioxide to carry out (comprising generating plant flue gas or industrial tail gas) the removal reaction of metal ion in rice husk, both cost-saving, can avoid industrial gaseous waste contaminate environment again.A 12MW unit biomass electric power plant produces 67.8 ten thousand tons of industrial smoke total amounts for 1 year, in industrial smoke, carbonated amount is 12%～15%, calculate 6.78 ten thousand tons of 1 year total carbon dioxide capacities by 10%, can rationally utilize these industrial smokes, its economic worth is considerable.
Two, carbonic acid soln is in processing the process of rice husk, after separating out throw out, in carbonic acid soln, also contain the solvends such as sodium, potassium, nitrogen phosphate and sulfur, these are the nutritive element that plant needs, can be using this carbonic acid soln directly as the nutritive medium of plant, reaction precipitation thing, for building or as purposes such as meterial additives, does not cause water pollution.And strong acid is after handling rice husk, directly discharge can cause environmental pollution, recycles that cost is higher, shortcoming economy.
Three, the rice husk after carbonic acid processing, after twice cleaning, then uses without salt solution and cleans extruding, then dry, can directly enter biomass electric power plant combustion power generation or chemical heat and decompose, and generation product is nano silicon, simple to operate.And rice husk after strong acid treatment also needs high-temperature calcination, then embathe and high purity water washing through strong acid, further reduce foreign matter content, then dry, just can enter biomass electric power plant burning and prepare nano silicon.
Beneficial effect of the present invention: industrial smoke is passed into the carbonic acid that makes the water-soluble formation of carbonic acid gas that it contains in water, the rice husk that utilizes carbonic acid and be immersed in water reacts, reach the object of removing metal ion in rice husk, rice husk after processing is after cleaning and being dried, without high-temperature calcination, both can directly enter biomass electric power plant combustion power generation or chemical heat and decompose, generation product is nano silicon.The present invention will originally may cause the industrial smoke of environmental pollution to carry out refuse reclamation, and environmental emission reduction, has low pollution, less energy-consumption, the recycling economy feature of high benefit.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of the retaining reaction tank in the present invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Fig. 3 is the sectional structure schematic diagram of the retort in the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Fig. 1～2, the embodiment of the present invention 1 provides a kind of method of utilizing industrial smoke to remove metal ion in rice husk, and step is as follows:
1, the degree of depth being set is the retaining reaction tank 1 that 7m, length and width are 100m, in retaining reaction tank 1 bottom, be provided with for discharging 25 gas dispersion apparatus 2 of industrial smoke, on gas dispersion apparatus 2, offer and make water body laterally or the gas orifice (not shown) of longitudinal shrinking turbulence stirring, and industrial smoke sprays from gas orifice.Gas orifice higher than pond at the bottom of more than 1.5m, pore size is 0.01mm.On gas dispersion apparatus 2, be also provided with a plurality of micro porous aeration heads, and industrial smoke sprays from micro porous aeration head.
2, rice husk 5 is packed and is thrown in retaining reaction tank 1, packed rice husk 5 is utilized and presses bag bar 3 to be pressed into underwater.
3, the carbonated industrial smoke of biomass electric power plant discharge is through dust removal installation, enter gas main 4, then by gas dispersion apparatus 2, sprayed in the pond that 5.5m is dark, under such pressure-acting, when the carbonic acid gas in industrial smoke and the meltage of water body rise to normal temperature and pressure 5 times, solubleness is 100 grams of water-soluble 1 gram of carbonic acid gas, the carbonic acid soln acidifying rice husk 5 generating, and with rice husk 5 in the metal ion generation throw out that reacts, after completion of the reaction, clean rice husk 5 and use without salt solution and clean extruding, sloughing the metal ion of absorption on rice husk 5.
In rice husk treating processes, produce solvend and reaction precipitation two classes, in solvend, be rich in nitrogen, phosphorus, potassium, sodium, small organic molecule etc., reaction precipitation owner wants metal carbonate or the oxide compounds such as aluminium, calcium, magnesium, iron, manganese, and the dust in reaction insolubles and flue gas is deposited to bottom, pond and forms the beds of precipitation.Reaction tank is processed 6 days rice husk cycles, after twice cleaning, then uses without salt solution and cleans extruding, sloughs in rice husk 60%～75% metal ion, once can process 2500 tons of rice husk amounts.
As shown in Figure 3, the embodiment of the present invention 2 provides the another kind of method of utilizing industrial smoke to remove metal ion in rice husk, and step is as follows:
While using retort 13, first at the interior filling rice husk 5 of retort 13 and water, rice husk 5 floats on the surface, its position should be under liquid distributor 11, and keep pneumatic outlet 10 for closing condition, in the micro porous aeration head of industrial smoke from gas distributor 7, spray, tank body and micro-pore aeration condition due to sealing, the pressure of the industrial smoke in retort 13 sharply increases, when the carbonic acid gas in industrial smoke and the meltage of water body reach normal temperature and pressure 20 times, solubleness is 100 grams of water-soluble 4 grams of carbonic acid gas, the carbonic acid soln generating and floating rice husk 5 reactions on it, and be sprayed on rice husk 5 by liquid distributor 11, carbonic acid and metal ion reaction generate throw out, after completion of the reaction, clean rice husk 5 and use without salt solution and clean extruding, slough the metal ion of absorption on rice husk 5.
Retort in retaining reaction tank 1 in embodiment 1 and embodiment 2 is combined to use, and retaining reaction tank 1 is done a bulk processing, and retort 13 is made secondary fine and processed, then uses without salt solution and clean extruding three times, can slough in rice husk 90% metal ion.
The above results shows, the method of utilizing industrial smoke to remove metal ion in rice husk provided by the present invention, can obtain with prior art and use strong acid to remove the same effect of metal ion in rice husk, reach the requirement that biomass electric power plant is prepared nano silicon completely.
Claims (5)
1. a method of utilizing industrial smoke to remove metal ion in rice husk, it is characterized in that: the method is to be provided with the gas dispersion apparatus (2) for discharging industrial smoke in retaining reaction tank (1) bottom, rice husk (5) is packed and is thrown in described retaining reaction tank (1), packed rice husk (5) is pressed into underwater, then by gas dispersion apparatus (2), industrial smoke is sprayed in pond, utilize the hydraulic pressure in retaining reaction tank (1), carbonic acid gas solubleness in water in industrial smoke is increased, solubleness is 100 grams of water-soluble 1 gram of carbonic acid gas, the carbonic acid soln generating and the metal ion in rice husk (5) the generation throw out that reacts, after completion of the reaction, clean rice husk (5) and use without salt solution and clean extruding, slough the metal ion of the upper absorption of rice husk (5), the degree of depth of described retaining reaction tank (1) is 6～10m, on described gas dispersion apparatus (2), offer and make water body laterally or the gas orifice of longitudinal shrinking turbulence stirring, and industrial smoke sprays from described gas orifice.
2. the method for utilizing industrial smoke to remove metal ion in rice husk according to claim 1, is characterized in that: described gas orifice higher than pond at the bottom of more than 1.5m.
3. the method for utilizing industrial smoke to remove metal ion in rice husk according to claim 2, is characterized in that: the pore size of described gas orifice is 0.005～0.012mm.
4. the method for utilizing industrial smoke to remove metal ion in rice husk according to claim 1 and 2, is characterized in that: described gas dispersion apparatus is also provided with a plurality of micro porous aeration heads on (2), and industrial smoke sprays from described micro porous aeration head.
5. a method of utilizing industrial smoke to remove metal ion in rice husk, it is characterized in that: the method is to be provided with the gas distributor (7) with micro porous aeration head in retort (13) bottom, the tank skin of the retort (13) of gas distributor (7) below is provided with circulation fluid outlet (6), at retort (13) top, be provided with pneumatic outlet (10), bottom and be provided with throw out outlet (8), on the top of retort (13), be provided with liquid distributor (11), while using described retort (13), first in retort (13), load rice husk (5) and water, and keep pneumatic outlet (10) for closing condition, in the micro porous aeration head of industrial smoke from gas distributor (7), spray, utilize the pressure of the industrial smoke in retort (13) itself, carbonic acid gas in the industrial smoke solubleness in water is increased, solubleness is 100 grams of water-soluble 4 grams of carbonic acid gas, the carbonic acid soln generating and the metal ion in rice husk (5) the generation throw out that reacts, after completion of the reaction, clean rice husk (5) and use without salt solution and clean extruding, slough the metal ion of the upper absorption of rice husk (5).
Priority Applications (16)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210082138.1A CN102616793B (en) | 2012-03-26 | 2012-03-26 | Method for eliminating metal ions in rice hulls by utilizing industrial flue gas |
| MYPI2014002722A MY165752A (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
| JP2015502067A JP5916941B2 (en) | 2012-03-26 | 2013-03-05 | Method for removing metal ions from rice husk using industrial exhaust gas |
| IN2033MUN2014 IN2014MN02033A (en) | 2012-03-26 | 2013-03-05 | |
| AP2014008028A AP3550A (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
| MX2014010961A MX358666B (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls. |
| KR1020147029910A KR101658917B1 (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
| PCT/CN2013/072165 WO2013143377A1 (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
| RU2014142868/05A RU2567629C1 (en) | 2012-03-26 | 2013-03-05 | Method of applying industrial furnace gas for removal of metal ions from husk of rice grains |
| BR112014023645-3A BR112014023645B1 (en) | 2012-03-26 | 2013-03-05 | METHOD USING INDUSTRIAL COMBUSTION GAS FOR REMOVAL OF METALLIC IONS FROM RICE SHELLS |
| EP13767805.8A EP2832692A4 (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
| AU2013242721A AU2013242721B2 (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
| CA2867364A CA2867364C (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
| SG11201405936TA SG11201405936TA (en) | 2012-03-26 | 2013-03-05 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
| US14/477,833 US9560867B2 (en) | 2012-03-26 | 2014-09-04 | Method for removal of metal ions from rice hull |
| ZA2014/07710A ZA201407710B (en) | 2012-03-26 | 2014-10-23 | Method utilizing industrial flue gas for removing metal ions from rice hulls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210082138.1A CN102616793B (en) | 2012-03-26 | 2012-03-26 | Method for eliminating metal ions in rice hulls by utilizing industrial flue gas |
Publications (2)
| Publication Number | Publication Date |
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| CN102616793A CN102616793A (en) | 2012-08-01 |
| CN102616793B true CN102616793B (en) | 2014-02-26 |
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| CN201210082138.1A Active CN102616793B (en) | 2012-03-26 | 2012-03-26 | Method for eliminating metal ions in rice hulls by utilizing industrial flue gas |
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| Country | Link |
|---|---|
| US (1) | US9560867B2 (en) |
| EP (1) | EP2832692A4 (en) |
| JP (1) | JP5916941B2 (en) |
| KR (1) | KR101658917B1 (en) |
| CN (1) | CN102616793B (en) |
| AP (1) | AP3550A (en) |
| AU (1) | AU2013242721B2 (en) |
| BR (1) | BR112014023645B1 (en) |
| CA (1) | CA2867364C (en) |
| IN (1) | IN2014MN02033A (en) |
| MX (1) | MX358666B (en) |
| MY (1) | MY165752A (en) |
| RU (1) | RU2567629C1 (en) |
| SG (1) | SG11201405936TA (en) |
| WO (1) | WO2013143377A1 (en) |
| ZA (1) | ZA201407710B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102616793B (en) * | 2012-03-26 | 2014-02-26 | 阳光凯迪新能源集团有限公司 | Method for eliminating metal ions in rice hulls by utilizing industrial flue gas |
| CN103693650B (en) * | 2013-12-25 | 2015-11-18 | 中盈长江国际新能源投资有限公司 | Biomass electric power plant rice hull ash and stack gas is utilized to produce the method for nano silicon and nano-calcium carbonate |
| CN115245191B (en) * | 2022-01-24 | 2023-11-14 | 王娜 | Cadmium removing method for rice |
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- 2013-03-05 IN IN2033MUN2014 patent/IN2014MN02033A/en unknown
- 2013-03-05 BR BR112014023645-3A patent/BR112014023645B1/en not_active IP Right Cessation
- 2013-03-05 AU AU2013242721A patent/AU2013242721B2/en not_active Ceased
- 2013-03-05 MX MX2014010961A patent/MX358666B/en active IP Right Grant
- 2013-03-05 MY MYPI2014002722A patent/MY165752A/en unknown
- 2013-03-05 EP EP13767805.8A patent/EP2832692A4/en not_active Withdrawn
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- 2013-03-05 KR KR1020147029910A patent/KR101658917B1/en active IP Right Grant
- 2013-03-05 WO PCT/CN2013/072165 patent/WO2013143377A1/en active Application Filing
- 2013-03-05 RU RU2014142868/05A patent/RU2567629C1/en not_active IP Right Cessation
- 2013-03-05 SG SG11201405936TA patent/SG11201405936TA/en unknown
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Also Published As
| Publication number | Publication date |
|---|---|
| RU2567629C1 (en) | 2015-11-10 |
| US20140377422A1 (en) | 2014-12-25 |
| US9560867B2 (en) | 2017-02-07 |
| MY165752A (en) | 2018-04-23 |
| CA2867364A1 (en) | 2013-10-03 |
| ZA201407710B (en) | 2015-12-23 |
| AU2013242721A1 (en) | 2014-10-30 |
| AP2014008028A0 (en) | 2014-10-31 |
| EP2832692A4 (en) | 2016-01-27 |
| BR112014023645B1 (en) | 2020-11-24 |
| JP5916941B2 (en) | 2016-05-11 |
| JP2015517898A (en) | 2015-06-25 |
| MX2014010961A (en) | 2015-02-24 |
| IN2014MN02033A (en) | 2015-08-14 |
| CN102616793A (en) | 2012-08-01 |
| WO2013143377A1 (en) | 2013-10-03 |
| KR20140140610A (en) | 2014-12-09 |
| KR101658917B1 (en) | 2016-09-22 |
| CA2867364C (en) | 2017-08-15 |
| SG11201405936TA (en) | 2014-11-27 |
| AU2013242721B2 (en) | 2015-12-03 |
| MX358666B (en) | 2018-08-31 |
| AP3550A (en) | 2016-01-15 |
| EP2832692A1 (en) | 2015-02-04 |
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